// Problem: 
// Contest: 
// URL: 
// Memory Limit: 
// Time Limit: 
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define int long long
inline int read(){
	int s=0,w=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')w=-1;ch=getchar();}
	while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
	return s*w;
}
signed main()
{
	int t=1;
	while(t--)
	{
		int n,m,al,ar,ac=INT_MAX;
		cin>>n>>m;
		vector<int> v(n+1);
		for(int i=1;i<=n;i++)
		{
			cin>>v[i];
		}
		int l=1,r=2,cnt=0;
		vector<int> hash(m+1);
		if(++hash[v[l]]==1)cnt++;
		if(++hash[v[r]]==1)cnt++;
		while(r<n)
		{
			r++;
			if(++hash[v[r]]==1)cnt++;
			while(cnt==m)
			{
				if(r-l<ac)al=l,ar=r,ac=r-l;
				if(--hash[v[l]]==0)cnt--;
				l++;
			}
		}
		cout<<al<<" "<<ar;
	}
	return 0;
}
